Table 3. Complications of the bronchoalveolar lavage.

Complications	With HFNC	Without HFNC
During bronchoalveolar lavage
Transient hypoxemia*	17 (51.5)	9 (39.1)
Hypotension†	1 (3.0)	0 (0)
After bronchoalveolar lavage
Fever‡	9 (27.3)	3 (13.0)
ETI within 24 hours	0 (0)	0 (0)

Values are presented as number (%).

^*Transient hypoxemia referred to the case where the SpO₂ value dropped to below 90% was maintained for less than 30 seconds during the bronchoalveolar lavage procedure. ^†Hypotension was the case where the systolic blood pressure was less than 90 mm Hg or the diastolic blood pressure was less than 60 mm Hg16. ^‡Fever was a body temperature of 37.8℃ or higher measured at the tympanic membrane17.

HFNC: high-flow nasal cannula; ETI: endotracheal intubation; SpO₂: oxygen saturation recorded by pulse oximetry.